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HONGKUN / PRODUCT DIRECTORY

Phenyl chloroformate | CAS 1885-14-9

An aromatic chloroformate for introducing phenoxycarbonyl functionality and preparing activated carbonate or carbamate intermediates, with intact chloroformate content and phenolic impurities relevant to reagent qualification.

CAS1885-14-9
Molecular formulaC7H5ClO2
Molecular weight156.56 g/mol

Product overview

An oxygen atom separates the phenyl ring from the carbonyl of phenyl chloroformate. This distinguishes PhO–C(O)Cl from benzoyl chloride, where the ring bonds directly to the carbonyl carbon, and from benzyl chloroformate, which contains an additional methylene. The reactive carbonyl chloride group makes this a reagent for carbonyl-transfer chemistry. A meaningful purchase specification identifies this connectivity, defines the assay basis and considers phenol or other related components that affect composition. Because the chloroformate is moisture sensitive, sampling and analytical preparation should preserve the material being measured.

Chemical identity

Chemical name
Phenyl chloroformate
CAS number
1885-14-9
Molecular formula
C7H5ClO2
Molecular weight
156.56 g/mol

Application context

Phenyl chloroformate is used to prepare phenoxycarbonyl-containing carbonate and carbamate structures. Published reagent applications also include phenyl mixed anhydrides for peptide-coupling chemistry and functional carbonate intermediates for materials research. The role depends on the nucleophile and the target bond: the phenoxycarbonyl fragment may be installed in an intermediate or participate in an activation sequence. Procurement should distinguish the reagent from a finished carbonate monomer or polymer. For a defined route, agree organic purity, intact reagent assay and controls for phenolic or moisture-derived material.

Chemistry and synthetic role

PhO–C(O)Cl combines a phenoxy group with a chloroformate carbonyl. It is neither benzoyl chloride nor the benzyl Cbz reagent.

Quality review

Establish phenoxy connectivity

Confirm the oxygen between phenyl and carbonyl.

Measure reagent and related phenolics

Use an assay and impurity method that can assess phenol separately.

Preserve identity during analysis

Agree suitable sampling and analytical preparation for a moisture-sensitive chloroformate.

Preparing a specification

Specify phenyl chloroformate connectivity, quantitative assay, organic impurity method and relevant phenol criteria. Agree moisture-related controls and sample preparation.

Packaging and storage

Packaging and net weight are agreed for the selected grade, order quantity and destination. Check the actual supplier SDS and label for storage and transport requirements.

Documentation

Request a batch COA, SDS and the analytical methods for the acceptance criteria below. Confirm which supporting chromatograms and identity data are available from the selected manufacturer.

Procurement questions

Is this benzyl chloroformate?

No. Benzyl chloroformate contains PhCH2O rather than PhO.

Why include phenol in the review?

It has no chloroformate functionality and changes the organic composition of the reagent.

Can sample preparation influence the result?

Exposure to reactive media may alter the analyte before measurement.

Technical sources
  1. PubChem CID 15891NCBI / PubChem
  2. Phenyl chloroformateTCI
  3. Phenyl chloroformate applicationsThermo Fisher Scientific